<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="js/jquery-3.7.0.js" type="text/javascript" charset="utf-8"></script>
		<script type="text/javascript">
			$(function(){
				$("input").eq(1).change(function(){
					var num1 = $("input").eq(0).val()-0
					var num2 = $("input").eq(1).val()-0
					res = (num1+num2).toFixed(15)-0
					$("input").eq(2).val(res)
				})				
			})
		</script>
	</head>
	<body>
		<input type="text" size="3"/>+
		<input type="text" size="3"/>=
		<input type="text"/>
	</body>
</html>
